Enhanced catalytic activity in strained chemically exfoliated WS 2 nanosheets for hydrogen evolution
Damien Voiry,Hisato Yamaguchi,Junwen Li,Rafael Silva,Diego C. B. Alves,Takeshi Fujita,Mingwei Chen,Tewodros Asefa,Vivek B. Shenoy,Goki Eda,Manish Chhowalla +10 more
Reads0
Chats0
TLDR
Analyses indicate that the enhanced electrocatalytic activity of WS₂ is associated with the high concentration of the strained metallic 1T (octahedral) phase in the as-exfoliated nanosheets.Abstract:
Efficient evolution of hydrogen via electrocatalysis at low overpotentials is promising for clean energy production. Monolayered nanosheets of chemically exfoliated WS2 are shown to be efficient catalysts for hydrogen evolution at very low overpotentials. The enhanced catalytic performance is associated with the high concentration of the strained metallic octahedral phase in the exfoliated nanosheets.read more
Citations
More filters
Journal ArticleDOI
Theoretical Studies on the Electronic and Optical Properties of Honeycomb BC3 monolayer: A Promising Candidate for Metal-free Photocatalysts.
TL;DR: By employing first-principles computations and particle-swarm optimization calculations, the honeycomb geometry of experimentally realized BC3 sheet is theoretically confirmed, indicating its efficient absorption of solar radiation, fast migration of electron and holes, and excellent capabilities of photoinduced carriers in a photocatalytic process, respectively.
Journal ArticleDOI
Determination of Crystal Axes in Semimetallic T′-MoTe2by Polarized Raman Spectroscopy
Junyong Wang,Xin Luo,Shisheng Li,Ivan Verzhbitskiy,Weijie Zhao,Shunfeng Wang,Su Ying Quek,Goki Eda +7 more
TL;DR: In this article, a non-destructive method for determining the crystal orientation of few-layer T′-MoTe2 flakes by polarized Raman spectroscopy was proposed, where the experimentally observed Raman modes were assigned to eigenmodes of vibrations predicted by density functional theory calculations.
Journal ArticleDOI
The electrical conductivity of solution-processed nanosheet networks
TL;DR: In this article, the authors highlight the central role that the inter-sheet junctions play in determining the electrical characteristics of such networks and propose simple models relating network conductivity and mobility to the junction resistance.
Journal ArticleDOI
Engineered MoSe2-based heterostructures for efficient electrochemical hydrogen evolution reaction
Leyla Najafi,Leyla Najafi,Sebastiano Bellani,Reinier Oropesa-Nuñez,Alberto Ansaldo,Mirko Prato,Antonio Esau Del Rio Castillo,Francesco Bonaccorso +7 more
TL;DR: In this paper, the authors designed and engineered heterostructures composed of single/few-layer MoSe2 flakes and carbon nanomaterials (graphene or single-wall carbon nanotubes (SWNTs)) produced by solution processing.
Journal Article
Evolution of the Valley Position in Bulk Transition-Metal Chalcogenides and their Mono-Layer Limit
Yulin Chen,Hongtao Yuan,Zhongkai Liu,Gang Xu,Bo Zhou,S.F. Wu,Dumitru Dumcenco,K. Yan,Yi Zhang,Sung-Kwan Mo,Pavel Dudin,Viktor Kandyba,M. Yablonskikh,Alexei Barinov,Zhi-Xun Shen,Shou-Cheng Zhang,Ying-Sheng Huang,Xiaodong Xu,Zahid Hussain,Harold Y. Hwang,Yi Cui +20 more
TL;DR: This work systematically imaged the conduction/valence band structure evolution across representative chalcogenides MoS2, WS2, and WSe2, as well as the thickness dependent electronic structure from bulk to the monolayer limit, to establish a solid basis to understand the underlying valley physics of these materials.
References
More filters
Journal ArticleDOI
Generalized Gradient Approximation Made Simple
TL;DR: A simple derivation of a simple GGA is presented, in which all parameters (other than those in LSD) are fundamental constants, and only general features of the detailed construction underlying the Perdew-Wang 1991 (PW91) GGA are invoked.
Journal ArticleDOI
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set.
Georg Kresse,Jürgen Furthmüller +1 more
TL;DR: An efficient scheme for calculating the Kohn-Sham ground state of metallic systems using pseudopotentials and a plane-wave basis set is presented and the application of Pulay's DIIS method to the iterative diagonalization of large matrices will be discussed.
Journal ArticleDOI
Projector augmented-wave method
TL;DR: An approach for electronic structure calculations is described that generalizes both the pseudopotential method and the linear augmented-plane-wave (LAPW) method in a natural way and can be used to treat first-row and transition-metal elements with affordable effort and provides access to the full wave function.
Journal ArticleDOI
Atomically thin MoS2: a new direct-gap semiconductor
TL;DR: The electronic properties of ultrathin crystals of molybdenum disulfide consisting of N=1,2,…,6 S-Mo-S monolayers have been investigated by optical spectroscopy and the effect of quantum confinement on the material's electronic structure is traced.
Journal ArticleDOI
Single-layer MoS2 transistors
TL;DR: Because monolayer MoS(2) has a direct bandgap, it can be used to construct interband tunnel FETs, which offer lower power consumption than classical transistors, and could also complement graphene in applications that require thin transparent semiconductors, such as optoelectronics and energy harvesting.